BENDIX TCH-005-012 User manual

Technical Bulletin

Bulletin No.: PRO-05-12 Effective Date: 6/30/86 Page: 1 of 1

Subject: ASA-2 Durability and Performance Improvements

We are pleased to announce that all ASA-2 automatic slack adjusters manufactured on

and after April 7, 1986 (D0786F and up) will incorporate several improvements designed

to increase durability and performance.

1. The designed shoe-to-drum clearance has been reduced to provide a closer

adjustment and increased actuator stroke reserve. The ASA-2 will continue to use

the more reliable concept of shoe-to-drum clearance sensing rather than sensing

actuator stroke.

2. Changes in the design of the adjusting linkage assembly have been made to

increase its durability and reduce the possibility of breakage.

3. Improvements have also been made to the internal anti-reverse clutch mechanism

which will provide added durability.

ASA-2 assembly part numbers remain unchanged (refer to catalog pages 05-A-17 to

05-A-19). The improved version of the ASA-2 is totally interchangeable with the

previous version. Mixing of old and new versions on the same axle is acceptable. The

improved adjusting linkage assembly will carry the same part number as the older

version and is completely interchangeable. Other detail and subassembly replacement

part numbers remain unchanged also and may be used on both old and new versions of

the ASA-2 assemblies.

In addition to using the date code, the improved ASA-2 may also be visually identified.